Automobile GPS positioner and automobile humidity detection method

The invention discloses an automobile GPS positioner and an automobile humidity detection method. According to the method, a humidity sensor sets a warning value as P, a regular time detection modulesets regular time as t, the regular time detection module sends out a signal to a microprocessor at the interval of time t, the microprocessor drives a heating module to preheat the interior of a shell, preheating time is set as T, and frost or water drops in the shell are heated to evaporate; after the preheating time reaches the time T, the humidity sensor detects the humidity in the shell, andthe humidity value detected by the humidity sensor is P1; and when P1 is greater than P, the humidity sensor sends a signal to the microprocessor, the microprocessor drives the heating module to perform second heating on the interior of the shell, and meanwhile the microprocessor drives a motor to rotate so as to open a dehumidification plate. The humidity sensor can detect the humidity in the shell; and when the humidity